Sign of times: Major League Baseball gives OK to electronic pitch

Royals like PitchCom electronic pitch-calling device

College baseball goes high-tech to send pitch calls to mound

Ian Happ gets 3 hits as Cubs beat Brewers 5-4 on opening day – KXAN Austin

After just four months, PitchCom is already reshaping MLB

Milwaukee Brewers pitchers have stopped using PitchCom system mostly

The Astros and the long history of sign-stealing in baseball - Royals Review

Players should be punished too in baseball's sign-stealing scandal - The Boston Globe

MLB set to test electronic communications for catchers and pitchers

Chicago baseball report: Starting pitching is giving White Sox and Cubs a glimmer of hope in substandard divisions